JP2018165442A - Pressure-feeding device and toilet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-feeding device and a toilet device which can suppress increase of air pressure in a storage tank in an embodiment of this invention.SOLUTION: A pressure-feeding device of an embodiment connected with a toilet bowl and pressure-feeding sewage comprises: a storage tank storing the sewage; an air housing portion communicating with the inside of the storage tank and housing air in the storage tank; and pressure-feeding means provided in the storage tank and pressure-feeding the sewage to a pressure-feeding drain pipe connected with an outside drain pipe by centrifugal force. The pressure-feeding drain pipe is provided with an opening communicating with the inside of the storage tank.SELECTED DRAWING: Figure 3

Description

  Aspects of the present invention generally relate to a pumping device and a toilet device.

  In a toilet device provided in a house or the like, drainage is performed using an inclined gradient of a drain pipe from a toilet bowl to a sewer pipe. Since drain pipes are installed at the time of construction, it is difficult to add or relocate toilet equipment later. Further, in an environment where elderly people who are difficult to move to the toilet room, care recipients, etc. live, there is a demand to install a toilet device next to a bed, for example. Therefore, a toilet device provided with a pressure feeding device has been proposed as a toilet device having a high degree of freedom in installation location (see, for example, Patent Document 1).

  A toilet device equipped with a pressure feeding device does not use the slope of the drainage pipe to allow sewage to reach the sewage pipe, but allows the sewage to reach the sewage pipe by a pump provided in a storage tank connected to the toilet. . In this case, when the user flows water after defecation, filth is introduced into the storage tank together with the water. When the pump is operated, the filth is crushed, and the crushed filth and water are pumped to the drain pipe through the pipe. Therefore, since the installation location is not limited by the position of the existing sewage pipe, the degree of freedom of the installation location of the toilet device can be increased.

Here, if there is no escape route for air existing in the storage tank, the air pressure in the storage tank rises with the introduction of water into the storage tank, and the introduction of water and filth into the storage tank may be hindered. There is. If the introduction of water and filth into the storage tank is hindered, some of the filth may remain in the bowl portion of the toilet bowl. In this case, if a hole is provided in the storage tank and a part of the air is released through the hole, it is possible to suppress an increase in the air pressure in the storage tank. However, when this is done, a bad odor is released outside the storage tank together with the air in the storage tank.
Therefore, it has been desired to develop a technique capable of suppressing an increase in air pressure in the storage tank.

Japanese Patent No. 5884279

  The aspect of this invention is made | formed based on recognition of this subject, and provides the pressure feeding apparatus and toilet apparatus which can suppress that the air pressure in a storage tank raises.

1st invention is a pumping apparatus connected with a toilet bowl and pumping sewage, Comprising: The storage tank which stores the said sewage, The air storage part which connects the inside of the said storage tank, and stores the air in the said storage tank And a pumping means for pumping the sewage to a pumping drain pipe connected to an external drain pipe by centrifugal force, and the pumping drain pipe includes This is a pumping device provided with a communicating opening.
If there is no air escape path in the storage tank, the air pressure in the storage tank rises and the inflow of water and filth from the toilet bowl is hindered. Since this pressure feeding device is provided with an air storage part, when the air pressure in the storage tank rises, the air in the storage tank can be caused to flow into the air storage part. Therefore, since an increase in the air pressure in the storage tank can be suppressed, it becomes easy for water and filth from the toilet bowl to flow into the storage tank.
Furthermore, since the pressure drainage pipe is provided with an opening communicating with the inside of the storage tank, the air in the storage tank can be allowed to flow into the pressure drainage pipe. Therefore, the increase in the air pressure in the storage tank can be further suppressed, so that it becomes easier for water and filth from the toilet bowl to flow into the storage tank.

The second invention is a pumping device that is connected to a toilet and pumps sewage, and is provided in the storage tank for storing the sewage, and is connected to an external drain pipe by centrifugal force. A pumping means for pumping the sewage to the pumping drainage pipe, the pumping drainage pipe is provided with an opening communicating with the inside of the storage tank, the pumping means includes a motor, and the motor The pumping operation is performed at a rotational speed for a predetermined time, and the pumping operation is performed at the predetermined rotational speed and then reversely rotated, or the motor performs the pumping operation at a first rotational speed for a predetermined time, and the first After performing the pumping operation for a predetermined time at a rotational speed of, the pumping operation is performed at a second rotational speed lower than the first rotational speed, or after the motor starts the pumping operation for a predetermined time After the elapse of time, the pumping operation is stopped, and the pumping operation is stopped. From a pumping device for re-starting the pumping operation after a predetermined time has elapsed.
If there is no air escape path in the storage tank, the air pressure in the storage tank rises and the inflow of water and filth from the toilet bowl is hindered. According to this pumping device, a negative pressure region can be formed in the pumping drain pipe, and the air in the storage tank can flow into the negative pressure region through the opening. Therefore, since an increase in the air pressure in the storage tank can be suppressed, it becomes easy for water and filth from the toilet bowl to flow into the storage tank.

In a third aspect based on the first aspect, the pumping means includes a motor, and the motor performs a pumping operation for a predetermined time at a predetermined rotational speed, and performs a pumping operation at the predetermined rotational speed. The motor rotates reversely, or the motor performs a predetermined time pumping operation at a first rotational speed, and after performing a predetermined time pumping operation at the first rotational speed, is lower than the first rotational speed The pumping operation is performed at the second rotation speed, or the motor stops the pumping operation after a predetermined time has elapsed after starting the pumping operation, and the predetermined time has elapsed since the pumping operation was stopped. This is a pumping device that starts the pumping operation again later.
According to this pumping device, a negative pressure region can be formed in the pumping drain pipe, and the air in the storage tank can flow into the negative pressure region through the opening. Therefore, since an increase in the air pressure in the storage tank can be suppressed, it becomes easy for water and filth from the toilet bowl to flow into the storage tank.

A fourth invention is a pressure feeding device according to any one of the first to third inventions, wherein the opening is provided with a check valve.
If a check valve is provided in the opening, it is possible to suppress the air drawn from the storage tank through the opening into the pressure feeding pipe from flowing into the storage tank again. Therefore, the air drawn into the pressure drainage pipe can be pumped more reliably to the external drainage pipe.

According to a fifth invention, in any one of the first to fourth inventions, the pressure-feed drain pipe has a pipe extending in a vertical direction in the storage tank, and the opening is provided in the pipe. It is a pumping device.
According to this pumping device, if an opening is provided in a pipe extending in the vertical direction in the storage tank, it is easy to provide an opening at an arbitrary position in the storage tank. Further, if a pipe extending in the vertical direction in the storage tank is provided, it becomes easy to develop a siphon phenomenon described later.

A sixth invention is the pumping device according to any one of the first to fifth inventions, wherein the opening is provided above a center in a height direction of the storage tank.
The air in the storage tank accumulates above the storage tank. If the opening is provided above the center in the height direction of the storage tank, it becomes easy to draw the air in the storage tank into the pressure drain pipe through the opening.

In a seventh aspect based on any one of the first to sixth aspects, when the opening is viewed from the outside of the pressure drainage pipe, the opening is in the flow direction of the sewage flowing through the pressure drainage pipe. On the other hand, it is a pumping device that faces an upstream side, a downstream side, or a direction substantially perpendicular to the flow direction of the sewage.
If the opening faces the upstream side with respect to the flow direction of sewage flowing through the pressure drainage pipe, the sewage flowing through the pressure drainage pipe can be prevented from flowing into the storage tank.
If the opening faces the downstream side with respect to the flow direction of the sewage flowing through the pressure drainage pipe, it becomes easy to provide the opening above the storage tank.
If the opening is oriented in a direction substantially perpendicular to the flow direction of the sewage flowing through the pressure drainage pipe, the opening can be easily formed.

An eighth invention is the pumping device according to any one of the first to seventh inventions, wherein an area of the opening is smaller than a flow path cross-sectional area of the pumping drain pipe.
If the area of the opening is smaller than the flow path cross section of the pressure drainage pipe, it is possible to suppress the sewage flowing through the pressure drainage pipe from flowing into the storage tank.

In a ninth aspect based on any one of the first to eighth aspects, the toilet is configured to be capable of expressing a siphon phenomenon, and the toilet discharges water and filth by the expressed siphon phenomenon. It is a pressure feeding device.
In the case of a siphon-type toilet, air is more easily involved due to the expressed siphon phenomenon, and the amount of air in the storage tank may be further increased as compared with a wash-out type toilet. According to this pumping apparatus, even if it is a siphon type toilet, it can suppress that the quantity of the air in a storage tank increases. Therefore, even in a siphon-type toilet, it becomes easy for water and filth to flow into the storage tank.

According to a tenth aspect of the present invention, in any one of the first to ninth aspects, the pressure-feed drainage pipe is configured to be capable of expressing a siphon phenomenon, and the sewage is formed downstream of the opening by the expressed siphon phenomenon. It is a pressure feeding device that conveys.
According to this pumping device, the sewage and the taken-in air can be sent out to the drainage pipe using the suction force generated by the developed siphon phenomenon.

An eleventh aspect of the invention is a toilet apparatus including a toilet and the above-described pumping device connected to the toilet.
According to this toilet apparatus, since the increase in the air pressure in the storage tank can be suppressed, it becomes easy for water and filth from the toilet bowl to flow into the storage tank.

  ADVANTAGE OF THE INVENTION According to the aspect of this invention, the pumping apparatus which can suppress the air pressure in a storage tank rising and the toilet apparatus can be provided.

It is a perspective view for illustrating a toilet device provided with a pumping device concerning an embodiment of the invention. It is a block diagram for illustrating the toilet apparatus provided with the pumping apparatus. It is sectional drawing for demonstrating a pumping apparatus. It is a conceptual diagram for illustrating generation | occurrence | production of the negative pressure in a pumping drain pipe. (A), (b) is a conceptual diagram for illustrating formation and movement of the negative pressure region 35d. It is a timing chart for illustrating operation of a toilet device concerning a comparative example. It is a timing chart for illustrating operation of toilet device 1 concerning this embodiment. It is sectional drawing for illustrating other arrangement | positioning forms of opening 35a1. It is sectional drawing for illustrating other arrangement | positioning forms of opening 35a1. It is sectional drawing for illustrating other arrangement | positioning forms of opening 35a1. It is sectional drawing for illustrating other arrangement | positioning forms of opening 35a1. It is sectional drawing for illustrating other arrangement | positioning forms of opening 35a1.

Hereinafter, embodiments of the present invention will be illustrated with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
Toilet devices are roughly classified into wash-off toilet devices and siphon-type toilet devices. The wash-off toilet device introduces water and filth into the storage tank using the potential energy of water stored in a low tank or the like. The siphon-type toilet device causes a siphon phenomenon to be expressed by a bent drainage pipe provided in the toilet bowl, and introduces water and filth into the storage tank by using a suction force by the siphon phenomenon.
Furthermore, the toilet device includes a siphon jet type toilet device and a flap valve type toilet device provided with a flap valve.
The pumping device according to the present embodiment can be provided in various types of toilet devices.
In the following, as an example, a siphon type toilet apparatus provided with a pressure feeding device will be described as an example.

FIG. 1 is a perspective view for illustrating a toilet apparatus provided with a pressure feeding device according to an embodiment of the present invention.
FIG. 2 is a configuration diagram for illustrating a toilet apparatus including a pressure feeding device.
As shown in FIGS. 1 and 2, the toilet device 1 includes a toilet 2, a pressure feeding device 3, a water supply pipe 4, a drain pipe 5, and a control unit 6.

The toilet bowl 2 is provided with a bowl part 20, a water supply device 21, a drainage pipe line 22, a leg 23, and an armrest 24.
The bowl portion 20 is provided on the front side in the toilet bowl 2 and receives filth and water supplied from the water supply device 21.
The water supply apparatus 21 has a water supply valve 21a and a water conduit 21b. The water supply valve 21a is provided between the water supply pipe 4 and the water conduit 21b. The water supply valve 21a switches between the start of water discharge from the water conduit 21b and the stop of water discharge. The water supply valve 21a can be, for example, an electromagnetic valve. The water guide path 21 b is provided above the bowl part 20 and supplies the water supplied from the water supply pipe 4 to the bowl part 20.

The drain line 22 is provided in the toilet 2. One end of the drain line 22 is connected to the bottom of the bowl part 20. The other end of the drain pipe 22 is connected to the pressure feeding device 3. The drainage pipe line 22 has a bent shape, and a siphon phenomenon is expressed.
A plurality of legs 23 are provided on the bottom surface of the toilet 2. The plurality of legs 23 support the toilet 2 at the place where the toilet apparatus 1 is installed.
The armrest 24 can be attached to, for example, the toilet 2 or the pressure feeding device 3. The armrest 24 illustrated in FIG. 1 is a flip-up armrest. If the armrest 24 is provided, it is possible to support the user's standing and sitting, and further, it is possible to maintain the balance while the user is sitting.

One end of the water supply pipe 4 is connected to a water supply valve 21a, and the other end of the water supply pipe 4 is connected to a water source such as a water supply. The water supply pipe 4 can be a flexible pipe, for example.
One end of the drain pipe 5 is connected to the pressure feeding device 3, and the other end of the drain pipe 5 is connected to a sewer pipe or the like. The drain pipe 5 can be a flexible pipe, for example.

For example, the control unit 6 may be a computer including a CPU (Central Processing Unit) and a memory. The controller 6 controls the operation of the water supply valve 21a and the motor 33d provided in the pressure feeding device 3 based on, for example, a program stored in the memory. Further, the control unit 6 can be electrically connected to the operation unit 6a and the notification unit 6b.
The operation unit 6a can be, for example, a washing switch for starting toilet bowl washing. The user can input a desired operation command to the operation unit 6a. For example, when the user inputs the start of the cleaning operation to the operation unit 6 a, the operation command is transmitted to the control unit 6. Based on the program stored in the memory, the control unit 6 opens the water supply valve 21a for a predetermined time, supplies water from the water conduit 21b to the bowl unit 20, and performs cleaning. Further, the control unit 6 controls the motor 33d provided in the pressure feeding device 3 based on a program stored in the memory to pulverize the filth, and pulverized filth and water (hereinafter referred to as sewage). Are pumped to the drain pipe 5.
Details of the operation of the pressure feeding device 3 will be described later.
The notification unit 6b includes an LED lamp, a small speaker, and the like, and notifies an operation command and state information visually or by sound. Further, the notification unit 6b can notify the user of an abnormality by turning on or blinking the LED lamp or generating a warning sound from a small speaker based on a signal from the control unit 6.

The pumping device 3 is provided between the drain pipe 22 and the drain pipe 5. The pressure feeding device 3 pulverizes the filth that flows along with the water via the drain pipe 22 and pumps it to the drain pipe 5 as sewage.
FIG. 3 is a cross-sectional view for illustrating the pressure feeding device 3.
As shown in FIG. 3, the pressure feeding device 3 is provided with a storage tank 31, a pulverizing unit 32, a pump 33, an air storage unit 34, and a pressure feeding drain pipe 35.
The storage tank 31 has a box shape. The storage tank 31 can have, for example, an airtight structure and a watertight structure. The storage tank 31 stores sewage.
The pulverization unit 32 is provided in the storage tank 31. The pulverizing unit 32 includes a pulverizing tank 32a and a rotating unit 32b.

  The crushing tank 32 a has a cylindrical shape and is provided in the storage tank 31. One end of the crushing tank 32 a is provided on the upper surface of the storage tank 31. The other end of the crushing tank 32 a is provided on the bottom side in the storage tank 31. The crushing tank 32a can be formed integrally with the storage tank 31, can be joined to the storage tank 31, or can be attached to the storage tank 31 using a fastening member such as a screw.

  A drain line 22 is connected to the lower part of the crushing tank 32a. Therefore, water and filth flow into the crushing tank 32a. At this time, if there is no escape route for air existing in the crushing tank 32a, the air pressure in the crushing tank 32a rises due to the inflow of water and filth, and the inflow of water and filth is inhibited. Therefore, an opening 32a1 is provided in the upper part of the crushing tank 32a. If the opening 32a1 is provided, the air in the crushing tank 32a can be released into the storage tank 31 when water and filth flow in, so that the inflow of water and filth can be suppressed. A plurality of openings 32a2 are provided in the lower part of the crushing tank 32a.

  The rotating part 32b is provided in the crushing tank 32a. The rotation part 32b can be provided in the area | region in which the some opening 32a2 was provided in the grinding | pulverization tank 32a. The rotating part 32b is rotated by a motor 33d via a rotating shaft 33c. The rotating part 32b has a base part 32b1, a disk 32b2, and a protrusion 32b3. The base 32b1 has a cylindrical shape and is attached to the rotation shaft 33c. The disc 32b2 is provided at the lower end of the base 32b1. A plurality of protrusions 32b3 are provided on the upper surface of the disk 32b2. If the plurality of protrusions 32b3 are provided, the filth becomes easy to be caught, so that the filth is pulverized and the crushed filth and water are easily stirred.

  The arrow in FIG. 3 represents the flow state of filth and water. The water and filth that flowed into the crushing tank 32a descend in the crushing tank 32a and reach the vicinity of the rotating disk 32b2. The water and filth that have reached the disc 32b2 move to the outer peripheral side of the disc 32b2, collide with the inner wall of the crushing tank 32a, rise along the inner wall of the crushing tank 32a, and move to the center side of the crushing tank 32a. However, it reaches the vicinity of the rotating disc 32b2 again. Therefore, the filth is stirred and pulverized while circulating in the pulverization tank 32a. The sewage generated in this way is supplied from the crushing tank 32a into the storage tank 31 through the plurality of openings 32a2. At this time, only the filth crushed smaller than the opening 32 a 2 is supplied into the storage tank 31.

The pump 33 pumps sewage. The type of the pump 33 is not particularly limited, but it is preferable to use a centrifugal pump that is relatively small, inexpensive, and capable of realizing a high head. As an example, the case where the pump 33 is a centrifugal pump will be described below as an example.
The pump 33 includes a pump chamber 33a, an impeller 33b, a rotating shaft 33c, and a motor 33d. In the present embodiment, the pump chamber 33 a and the impeller 33 b are provided in the storage tank 31 and serve as a pressure feeding unit that pumps dirty water to the pressure feeding drain pipe 35 connected to the external drain pipe 5 by centrifugal force.

  The pump chamber 33a is provided on the bottom surface of the crushing tank 32a. The pump chamber 33a can be formed integrally with the crushing tank 32a, can be joined to the crushing tank 32a, or can be attached to the crushing tank 32a using a fastening member such as a screw.

  The impeller 33b is provided in the pump chamber 33a. The impeller 33b is attached to the rotating shaft 33c. The impeller 33b has a plurality of blades 33b1. The plurality of blades 33b1 have, for example, the same shape and can be provided so as to be point-symmetric about the center of the rotation shaft 33c in plan view.

  The rotating shaft 33c extends in the vertical direction in the crushing tank 32a. One end of the rotating shaft 33c is connected to the motor 33d. The rotating shaft 33c can be connected to the rotating shaft of the motor 33d through a coupling or the like, or the rotating shaft of the motor 33d can be used as the rotating shaft 33c.

  The motor 33d rotates the rotating part 32b and the impeller 33b via the rotating shaft 33c. The type of the motor 33d is not particularly limited, but variable speed control is possible. The motor 33d can be, for example, a DC brushless motor. The motor 33d can be provided outside the storage tank 31. The motor 33d can be provided on the upper surface of the storage tank 31, for example, via the casing 33d1.

  When the impeller 33b is rotated by the motor 33d, the sewage in the crushing tank 32a flows into the storage tank 31 through the opening 32a2 as represented by the arrow in FIG. The sewage that has flowed into the storage tank 31 flows into the pump chamber 33a through the opening 33a3 of the pump chamber 33a, and is pumped to the pumping drain pipe 35.

The air storage part 34 is provided outside the storage tank 31. The air storage unit 34 communicates with the storage tank 31 and stores the air in the storage tank 31. The air storage portion 34 is connected to a portion where the air in the storage tank 31 exists. Therefore, it is preferable to provide the air storage part 34 on the upper surface of the storage tank 31 or the upper part of the side surface. The air storage portion 34 has a bag shape and is made of a flexible sheet material. As described above, when water and filth flow into the crushing tank 32a, the air in the crushing tank 32a flows into the storage tank 31 through the opening 32a1. Since the storage tank 31 has an airtight structure, if there is no air escape path, the air pressure in the storage tank 31 and thus the air pressure in the crushing tank 32a will rise, and the inflow of water and filth will be hindered. Therefore, an air storage unit 34 is provided to adjust the air pressure in the storage tank 31 and thus the air pressure in the crushing tank 32a. If the air storage part 34 is provided, the air in the storage tank 31 can be caused to flow into the air storage part 34 when the air pressure in the storage tank 31 rises. For this reason, an increase in the air pressure in the storage tank 31, and hence an increase in the air pressure in the crushing tank 32a, can be suppressed, so that water and filth can easily flow into the crushing tank 32a.
When sewage is pumped by the pump 33, the water level in the storage tank 31 decreases and the volume of air in the storage tank 31 increases, so the air pressure in the storage tank 31 decreases. Therefore, a part of the air in the air storage part 34 is supplied again into the storage tank 31.

One end of the pressure feed drain pipe 35 is connected to the pump chamber 33 a, and the other end of the pressure feed drain pipe 35 is connected to the drain pipe 5 outside the pressure feed device 3. The pressure drain pipe 35 includes a pipe 35a, a pipe 35b, and a pipe 35c.
One end of the pipe 35 a is provided in the storage tank 31, and the other end of the pipe 35 a is provided outside the storage tank 31. The pipe 35a extends in the vertical direction in the storage tank 31. One end of the pipe 35b is connected to the pipe 35a, and the other end of the pipe 35b is connected to the pipe 35c. The pipe 35b is not always necessary, and the pipe 35a and the pipe 35c may be directly connected. The pipe 35 c is provided outside the storage tank 31. The pipe 35c extends in the vertical direction. The end of the pipe 35c on the drain pipe 5 side is provided at the same position as the pump chamber 33a or below the pump chamber 33a. Therefore, the pressure-feed drainage pipe 35 can cause a siphon phenomenon. If the siphon phenomenon can be expressed, the sewage and the taken-in air can be sent out to the drain pipe 5 by using the suction force by the siphon phenomenon.

  Here, when water and filth flow from the bowl portion 20 into the crushing tank 32a, air may be involved and air may flow into the crushing tank 32a. When air flows into the crushing tank 32a, the volume of the air increases, so that the air pressure in the crushing tank 32a easily rises when water and filth flow. In this case, air flows into the crushing tank 32a every time the user uses the toilet device 1. Further, since the storage tank 31 has an airtight structure, the volume of air in the storage tank 31 gradually increases every time the user uses the toilet apparatus 1. In this case, an increase in air pressure in the storage tank 31 can be suppressed by the air storage unit 34, but there is a limit to the volume of air that can be stored in the air storage unit 34. If air cannot be stored in the air storage portion 34, the increase in air pressure in the storage tank 31, and consequently the increase in air pressure in the crushing tank 32a, cannot be suppressed, and the inflow of water and filth into the crushing tank 32a is hindered. Will be.

  In this case, an opening can be provided in the storage tank 31 and part of the air in the storage tank 31 can be released to the outside, but a bad odor is released to the outside of the storage tank 31 together with the air in the storage tank 31. . The pump 33 such as a centrifugal pump conveys fluid toward the centrifugal direction of the rotary shaft, and those having a low specific gravity gather on the rotary shaft side, and those having a high specific gravity on the centrifugal direction side of the rotary shaft. get together. That is, the pump 33 such as a centrifugal pump can pump liquid (water), but cannot pump gas (air) having a lighter specific gravity than the liquid (water). Therefore, it is difficult for the pump 33 to discharge the air in the storage tank 31 to the outside of the storage tank 31 together with the sewage.

As a result of the study, the present inventor has obtained knowledge that a negative pressure can be generated in the pressure-feed drainage pipe 35 by changing the speed of sewage pumped in the pressure-feed drainage pipe 35.
FIG. 4 is a conceptual diagram for illustrating the generation of a negative pressure in the pressure feed / drain pipe 35.
FIGS. 5A and 5B are conceptual diagrams for illustrating the formation and movement of the negative pressure region 35d.
When the speed of sewage pumped through the pressure drainage pipe 35 is reduced, the sewage tends to move upstream due to inertia force or suction force generated by the siphon phenomenon expressed by the pressure drainage pipe 35. On the other hand, since the pressure drainage pipe 35 has a pipe resistance, the upstream movement of the sewage is hindered. Therefore, as shown in FIG. 4, a gap is generated between the upstream side of the sewage and the downstream side of the sewage, and the pressure in the region 35d becomes a negative pressure.

  As shown in FIGS. 3 and 4, if the opening 35 a 1 communicating with the inside of the storage tank 31 is provided in the pressure drain pipe 35, the air in the storage tank 31 can be caused to flow into the pressure drain pipe 35. When the air in the storage tank 31 flows into the area 35d, the air pressure in the area 35d becomes substantially the same as the air pressure in the storage tank 31.

Next, as shown in FIG. 5A, when the sewage speed is increased again, the sewage on the downstream side moves upstream. At this time, since air is present in the region 35d, the upstream sewage and the downstream sewage are prevented from being combined again. Therefore, when the downstream sewage moves upstream, the upstream sewage is pushed upstream through the region 35d.
Thereafter, when the speed of the sewage is repeatedly changed, as shown in FIG. 5B, the area 35d is sequentially formed, and the air in the area 35d is sequentially pumped to the drain pipe 5. Therefore, the air in the storage tank 31 can be discharged.

  The formation position of the region 35d can be controlled by the rotation speed of the motor 33d (impeller 33b). In this case, the formation position of the region 35d can be affected by the viscosity of the sewage, the pipeline resistance of the pressure drain pipe 35, the pressure of the sewage, and the like. Therefore, it is preferable to appropriately determine the control amount of the motor 33d by performing experiments and simulations.

  FIG. 6 is a timing chart for illustrating the operation of the toilet apparatus according to the comparative example. As shown in FIG. 6, when the washing switch (operation unit 6a) is turned on, toilet flushing is started. That is, the water supply valve 21a is opened, and water is supplied from the water conduit 21b to the bowl portion 20. The water supplied to the bowl part 20 flows into the crushing tank 32a together with the filth by the suction force due to the siphon phenomenon. Next, the motor 33d of the pump 33 operates to pulverize the filth, and the sewage composed of the crushed filth and water is pumped to the drain pipe 5. Therefore, the amount of sewage in the storage tank 31 decreases. As described above, when water and filth flow from the bowl portion 20 into the crushing tank 32a, air is entrained, and the amount of air in the crushing tank 32a and thus in the storage tank 31 increases. The increase in the amount of air in the storage tank 31 occurs every time the user uses the toilet device 1.

In this case, with the siphon-type toilet device 1, air is likely to be further involved due to the expressed siphon phenomenon, and the amount of air in the storage tank 31 may further increase.
When the amount of air in the storage tank 31 increases, the air pressure in the crushing tank 32a communicating with the storage tank 31 increases, and the inflow of water and filth is inhibited.

FIG. 7 is a timing chart for illustrating the operation of the toilet apparatus 1 according to this embodiment.
As shown in FIG. 7, when the washing switch (operation unit 6a) is turned on, toilet flushing is started. That is, the water supply valve 21a is opened, and water is supplied from the water conduit 21b to the bowl portion 20. The water supplied to the bowl part 20 flows into the crushing tank 32a together with the filth by the suction force due to the siphon phenomenon. Next, the motor 33d of the pump 33 operates to pulverize the filth, and the sewage composed of the crushed filth and water is pumped to the drain pipe 5. At this time, the motor 33d is controlled to change the speed of the sewage being pumped. Therefore, the amount of sewage in the storage tank 31 is decreased stepwise. Further, as described above, the motor 33d is controlled so that the negative pressure region 35d is formed at the position of the opening 35a1 of the pressure feed / drain pipe 35. Therefore, the air in the storage tank 31 flows into the area 35d, and the air in the storage tank 31 is discharged stepwise by repeating the formation and movement of the area 35d. Therefore, even if it is the siphon type toilet bowl 2, it can suppress that the air pressure in the crushing tank 32a connected with the storage tank 31 rises, and the inflow of water and filth is inhibited.

In FIG. 7, the pump 33 (motor 33 d) starts the pumping operation, stops the pumping operation after a lapse of a predetermined time, and starts the pumping operation again after the lapse of a predetermined time after stopping the pumping operation. Like to do. That is, the case where the intermittent operation which repeats starting and a stop of motor 33d is performed was illustrated.
However, the operation mode of the pump 33 is not limited to this.
For example, the pump 33 (the motor 33d) performs the pumping operation for a predetermined time at the first rotation speed, performs the pumping operation for the predetermined time at the first rotation speed, and then has a second speed lower than the first rotation speed. The pumping operation may be performed at the number of rotations. That is, the motor 33d may repeat the deceleration operation and the acceleration operation. Even in this manner, the formation of the negative pressure region 35d, the inflow of air into the region 35d, and the movement of the region 35d into which air has flowed can be performed. That is, it is possible to obtain the same effects as those described above.
Further, the motor 33d (motor 33d) can perform a pumping operation for a predetermined time at a predetermined rotational speed, and can perform a reverse rotation after performing the pumping operation at a predetermined rotational speed. The impeller 33b of the pump 33, which is a centrifugal pump, can pump sewage if it rotates in a predetermined direction. However, if the impeller 33b rotates in the opposite direction, the efficiency decreases and the sewage pumping is suppressed. Therefore, even in this manner, the formation of the negative pressure region 35d, the inflow of air into the region 35d, and the movement of the region 35d into which air has flowed can be performed. That is, it is possible to obtain the same effects as those described above.

The area of the opening 35a1 is smaller than the flow path cross-sectional area of the pressure drain pipe 35 (pipe 35a) (inner cross-sectional area in the direction orthogonal to the direction in which the pipe 35a extends). If the area of the opening 35a1 is smaller than the flow path cross section of the pressure drainage pipe 35, the sewage flowing through the pressure drainage pipe 35 can be prevented from flowing into the storage tank 31 from the opening 35a1.
In addition, the opening 35a1 is preferably provided above the center of the storage tank 31 in the height direction. The air in the storage tank 31 is accumulated above the storage tank 31. If the opening 35a1 is provided above the center of the storage tank 31 in the height direction, the air in the storage tank 31 can be easily drawn into the pressure-feed drain pipe 35 through the opening 35a1.
As shown in FIG. 3, a check valve 36 can be provided in the opening 35a1. If the check valve 36 is provided in the opening 35 a 1, it is possible to suppress the air drawn from the storage tank 31 through the opening 35 a 1 into the pressure feeding pipe 35 from flowing into the storage tank 31 again. Therefore, the air drawn into the pressure drainage pipe 35 can be pumped more reliably to the external drainage pipe 5.

8 to 12 are cross-sectional views for illustrating other arrangement forms of the opening 35a1.
The opening 35a1 illustrated in FIG. 3 is directly provided in the pipe 35a, but the opening 35a1 illustrated in FIGS. 8 to 12 has the opening of the pipe 35a2 connected to the side surface of the pipe 35a as the opening 35a1. . If the pipe 35a2 connected to the side surface of the pipe 35a is provided, the opening 35a1 can be provided at an arbitrary position.

In this case, as shown in FIGS. 8 and 11, when the opening 35a1 is viewed from the outside of the pressure-feed drain pipe 35, the opening 35a1 faces the upstream side with respect to the flow direction of sewage flowing through the pipe 35a. be able to.
If it does in this way, it can suppress that the sewage which flows through the inside of the pressure piping 35a flows in into the storage tank 31 from opening 35a1.
Further, the pipe 35a2 may have a straight form as shown in FIG. 8, or may have a bent form as shown in FIG.
Further, as shown in FIG. 8, the central axis of the pipe 35a2 may be inclined with respect to the central axis of the pipe 35a.

Further, as shown in FIG. 9, when the opening 35a1 is viewed from the outside of the pressure drain pipe 35, the opening 35a1 may be oriented in a direction substantially perpendicular to the flow direction of sewage flowing through the pipe 35a. it can.
In this way, the opening 35a1 can be easily formed.

Also, as shown in FIGS. 10 and 12, when the opening 35a1 is viewed from the outside of the pressure-feed drain pipe 35, the opening 35a1 faces the downstream side with respect to the flow direction of sewage flowing through the pipe 35a. Can do.
If it does in this way, it will become easy to provide opening 35a1 in the storage tank 31 upper direction. The air in the storage tank 31 is accumulated above the storage tank 31. If the opening 35 a 1 is provided above the storage tank 31, it becomes easy to draw the air in the storage tank 31 into the pressure drain pipe 35.
In this case, the pipe 35a2 may have a straight shape as shown in FIG. 10, or may have a bent shape as shown in FIG.
As shown in FIG. 10, the center axis of the pipe 35a2 can be inclined with respect to the center axis of the pipe 35a.

The embodiment has been illustrated above. However, the present invention is not limited to these descriptions.
Regarding the above-described embodiments, those in which those skilled in the art appropriately added, deleted, or changed the design of the components are also included in the scope of the present invention as long as they have the features of the present invention.
Moreover, each element with which each embodiment mentioned above is combined can be combined as much as possible, and what combined these is also included in the scope of the present invention as long as the characteristics of the present invention are included.

  DESCRIPTION OF SYMBOLS 1 Toilet device, 2 Toilet bowl, 3 Pumping device, 4 Water supply pipe, 5 Drainage pipe, 6 Control part, 20 Bowl part, 21 Water supply apparatus, 22 Drainage pipe line, 31 Storage tank, 32 Crushing part, 32a Crushing tank, 32b Rotation Part, 33 pump, 33a pump chamber, 33b impeller, 33c rotating shaft, 33d motor, 34 air storage part, 35 pumping drain pipe, 35a pipe, 35a1 opening, 35a2 pipe, 35b pipe, 35c pipe

Claims (11)

A pumping device connected to a toilet and pumping sewage,
A storage tank for storing the sewage;
Communicating with the inside of the storage tank, and an air storage section for storing the air in the storage tank;
A pumping means that is provided in the storage tank and pumps the sewage to a pumping drain pipe connected to an external drain pipe by centrifugal force;
With
A pumping device in which the pumping drain pipe is provided with an opening communicating with the inside of the storage tank. A pumping device connected to a toilet and pumping sewage,
A storage tank for storing the sewage;
A pumping means that is provided in the storage tank and pumps the sewage to a pumping drain pipe connected to an external drain pipe by centrifugal force;
With
The pressure drain pipe is provided with an opening communicating with the inside of the storage tank,
The pressure feeding means includes a motor,
The motor performs a pumping operation for a predetermined time at a predetermined rotational speed, and performs a reverse rotation after performing the pumping operation at the predetermined rotational speed, or
The motor performs a predetermined time pumping operation at a first rotational speed, performs a predetermined time pumping operation at the first rotational speed, and then performs a second rotational speed lower than the first rotational speed. Perform pumping operation, or
The motor is a pumping device which starts the pumping operation, stops the pumping operation after a lapse of a predetermined time, and restarts the pumping operation after a lapse of a predetermined time after the pumping operation is stopped. The pressure feeding means includes a motor,
The motor performs a pumping operation for a predetermined time at a predetermined rotational speed, and performs a reverse rotation after performing the pumping operation at the predetermined rotational speed, or
The motor performs a predetermined time pumping operation at a first rotational speed, performs a predetermined time pumping operation at the first rotational speed, and then performs a second rotational speed lower than the first rotational speed. Perform pumping operation, or
2. The motor according to claim 1, wherein after the pumping operation is started, the motor stops the pumping operation after a lapse of a predetermined time, and starts the pumping operation again after a lapse of a predetermined time after the pumping operation is stopped. Pumping device.   The pressure feeding device according to claim 1, wherein the opening is provided with a check valve. The pressure feed drain pipe has a pipe extending in the vertical direction in the storage tank,
The said opening is a pumping apparatus as described in any one of Claims 1-4 provided in the said piping.   The said opening is a pumping apparatus as described in any one of Claims 1-5 provided above the center of the height direction of the said storage tank.   When the opening is viewed from the outside of the pressure drainage pipe, the opening is upstream or downstream with respect to the flow direction of the sewage flowing through the pressure drainage pipe, or substantially with respect to the flow direction of the sewage. The pumping device according to any one of claims 1 to 6, which is directed in a vertical direction.   The area of the said opening is a pumping apparatus as described in any one of Claims 1-7 smaller than the flow-path cross-sectional area of the said pumping drain pipe.   The pumping device according to any one of claims 1 to 8, wherein the toilet is configured to be capable of expressing a siphon phenomenon, and the toilet discharges water and filth by the expressed siphon phenomenon. The pumping drain pipe is configured to be capable of expressing a siphon phenomenon,
The pumping device according to any one of claims 1 to 9, wherein the sewage is conveyed by the expressed siphon phenomenon downstream of the opening. Toilet bowl,
The pumping device according to any one of claims 1 to 10 connected to the toilet,
Toilet device equipped with.

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